How do I add a user profile?

Log in and go to your User page by clicking on your User Name in the top menu.

From your User page, click Edit in the left menu. You'll see two sections:

Surnames and/or places you are researching - Enter one surname and/or place per line. The information entered here is used to link your User name to Surname in place pages where you can find others with similar research interests (ex. User:Dallan).